电流正反馈自动调速系统设计  

Design of the Automatic Speed Control System via Current Positive Feedback

作　　者：金轶锋[1] 

机构地区：[1]渭南师范学院物理与电气工程学院,陕西渭南714099

出　　处：《渭南师范学院学报》2014年第7期12-15,共4页Journal of Weinan Normal University

基　　金：渭南师范学院科研计划项目:测控技术实验与研究平台建设(渭师院发〔2014〕10号)

摘　　要：在电压负反馈的基础上,给发电机、电动机换向绕组两端并联电阻RI,用以检测主回路电流I,从RI取出它的一部分电压作为电流正反馈信号加到扩大机控制绕组CII上.当电压负反馈系数αV增大时,电流正反馈系数αI也要增大,从而提高了发电机的端电压,补偿了电动机因负载变化而造成的转速降,保证了系统具有较硬的静特性.Under the premise of being equipped with a voltage negative feedback, a resistanceRI in parallel was then connected to both ends of the commutation winding of a generator or an electromotor. From the resistance R1 , part of the voltage was branched off as the current positive feedback signal, which was added to the amplifier control winding CII for detection of the primary loop cur- rent I. When the voltage negative feedback coefficient αv increased, positive current feedback coefficient α1 also went up, so to rise the terminal voltage of the generator, compensate the motor speed reduction caused by the load change, and ensure the hard static properties of the system.

关 键 词：电压负反馈 电流正反馈 自动调速 

分 类 号：TP272[自动化与计算机技术—检测技术与自动化装置]